When you log in with your hotel voucher, you can refine to the location of interest and select the dates you would like to check. When entering the dates of your search, you can add more nights than what is covered by your voucher.
For example, if you have a two-night voucher, you can select 4 nights and our system will advise you have added two extra nights to your search and you can browse the available options and pay the relevant surcharge that will be listed, to book this longer stay.